Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-04-05
Nature 435:629-636,2005
Astronomy and Astrophysics
Astrophysics
Nature, in press, 42 pages, 11 Figures, Supplementary Information included, movie available http://www.mpa-garching.mpg.de/gal
Scientific paper
10.1038/nature03597
The cold dark matter model has become the leading theoretical paradigm for the formation of structure in the Universe. Together with the theory of cosmic inflation, this model makes a clear prediction for the initial conditions for structure formation and predicts that structures grow hierarchically through gravitational instability. Testing this model requires that the precise measurements delivered by galaxy surveys can be compared to robust and equally precise theoretical calculations. Here we present a novel framework for the quantitative physical interpretation of such surveys. This combines the largest simulation of the growth of dark matter structure ever carried out with new techniques for following the formation and evolution of the visible components. We show that baryon-induced features in the initial conditions of the Universe are reflected in distorted form in the low-redshift galaxy distribution, an effect that can be used to constrain the nature of dark energy with next generation surveys.
Colberg Joerg
Cole Shaun
Couchman Hugh
Croton Darren
Evrard August
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